Re: Frequency Content

[Thomas G Brennan <g_brennantg@xxxxxxxxxxxxxxx>]

There's a DOS program on my site that will do what you need.

http://titan.sfasu.edu/~g_brennantg/fft128.zip

Tom


Tom Brennan, CCC-A/SLP, RHD
web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html

On Tue, 30 Jul 2002, Marius & Elsabe wrote:

> Date: Tue, 30 Jul 2002 19:23:26 +0200
> From: Marius & Elsabe <vulcan@PARYS.CO.ZA>
> To: AUDITORY@LISTS.MCGILL.CA
> Subject: Frequency Content
>
> Hello everyone,
>
> I am in desperate need of a way to determine the frequency content of a
> 'raw' amplitude-time sample.  I know that Fourier Transform can do this, but
> all of the texts I have read are at the advanced level, and quite frankly I
> have no idea what they are talking about.
>
> The raw data is in the form of a 512 byte array, defined as char
> rawdata[512].  This array is continually filled by my microphone audio
> grabbing code.  Now I need to be able to pass this array to a function which
> would fill another array, say fourierdata, with the frequency information.
>
> If anyone can be of assistance, I would really appreciate it.  Specifically,
> if you can supply me with C code to implement such a fourier function, I
> would be very greatful.
>
> Thank you,
> Marius Myburg
>